9 Microfiche Transparencies Containing Technical and Color Information About Ophthalmic Eyeglass Frames and Accessories
The drawing is lined to show the letters in color, as follows: "C" - red; "O" - orange; "L" - yellow; "O" - green; "R" - light blue; "F" - dark blue; "A" - red; "C" - orange; "T" - yellow; and "S" - green.